用于真空环境的光纤光栅温度传感器设计

光纤光栅传感器在航空航天领域有着广阔的应用前景,为了实现在航空航天真空环境下对卫星结构进行温度测量,对光纤光栅进行了特殊封装结构设计,在准确采集温度数据的同时,排除了结构应变对测量结果的影响,并对设计进行了有限元仿真分析。在-60-60℃的温度环境下,这种新型封装光纤光栅温度传感器的测试线性度为0.998,温度灵敏度为14.87pm/℃。为了验证其解耦特性,在MTS拉伸试验机上进行了测试,试验结果表明:结构形变带来的应变对该温度传感器没有影响,与理论分析相符。将其运用到实际真空环境进行对比验证,实验精度达0.15+0.002|t|℃。

Optical Fiber Grating Temperature SensorDesigned for Vacuum Environment

Fiber Bragg grating sensor has a broad application prospect in the field of aerospace.In order to achieve the measurement of temperature under the background of aerospace vacuum environment,special packaging for fiber Bragg grating structure was designed,at the same time of collecting temperature data accurately,the effects of structure strain on the measurement results were eliminated.In-60℃-60℃ temperature environment,the linearity of this kind of new encapsulation fiber Bragg grating temperature sensor is 0.998,and the temperature sensitivity is 14.87 pm/℃.In order to verify its decoupling characteristics,a load testing was applied on the MTS tensile testing machine,result is consistent with theoretical analysis.A contrast experiment was implemented in the actual vacuum environment,experiment precision is 0.15+0.002|t|℃.